CVE-2026-9197 in Smart Slider 3 Plugin
Summary
by MITRE • 06/06/2026
The Smart Slider 3 plugin for WordPress is vulnerable to Directory Traversal in all versions up to, and including, 3.5.1.36 via the replaceHTMLImage function. This makes it possible for authenticated attackers, with administrator-level access and above, to read the contents of arbitrary files on the server, which can contain sensitive information.
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Analysis
by VulDB Data Team • 06/06/2026
The Smart Slider 3 WordPress plugin presents a critical directory traversal vulnerability that affects all versions up to and including 3.5.1.36 through its replaceHTMLImage function. This vulnerability represents a fundamental flaw in input validation and file access control mechanisms within the plugin's codebase. The issue arises from insufficient sanitization of user-supplied parameters that are processed during HTML image replacement operations, creating an exploitable path traversal condition that allows malicious actors to access arbitrary files on the affected server. The vulnerability specifically targets the replaceHTMLImage function which handles image processing operations, making it particularly dangerous as it operates within the context of legitimate plugin functionality.
Attackers with administrator-level privileges or higher can leverage this vulnerability to read sensitive files from the server filesystem, potentially accessing configuration files, database credentials, user information, and other confidential data. The directory traversal condition enables attackers to navigate beyond the intended file boundaries and retrieve files that should remain protected. This vulnerability directly maps to CWE-22 - Improper Limitation of a Pathname to a Restricted Directory, which is a well-established weakness in software security where insufficient validation of file paths allows unauthorized access to system resources. The attack vector specifically exploits the plugin's handling of file paths during image replacement operations, where user input is not properly validated or sanitized before being used in file system operations.
The operational impact of this vulnerability is severe as it provides attackers with the ability to extract sensitive information from the WordPress installation, potentially leading to complete system compromise. An authenticated attacker with administrator privileges can systematically explore the server filesystem, accessing critical files such as wp-config.php containing database credentials, plugin configuration files, user authentication data, and other sensitive information. This vulnerability undermines the principle of least privilege and can lead to privilege escalation attacks, where attackers gain unauthorized access to additional system resources. The exploitation of this vulnerability can result in data breaches, system compromise, and potential lateral movement within network environments where the compromised WordPress installation exists.
Mitigation strategies for this vulnerability should focus on immediate remediation through plugin updates to versions that address the directory traversal flaw. System administrators should implement strict access controls and monitor user activities within the WordPress administration interface to detect potential exploitation attempts. Network-based intrusion detection systems should be configured to monitor for suspicious file access patterns and path traversal attempts. Additionally, implementing proper input validation and output encoding practices, following the principle of least privilege, and maintaining regular security audits of installed plugins can prevent similar vulnerabilities from occurring. The ATT&CK framework categorizes this vulnerability under T1059 - Command and Scripting Interpreter and T1566 - Phishing, as attackers may use this vulnerability to gather intelligence before executing more sophisticated attacks. Organizations should also consider implementing web application firewalls to detect and block malicious path traversal attempts, and establish robust backup and recovery procedures to ensure system integrity in case of successful exploitation.